Boat-propeller.



J. A. HTZPATRICK.

BOAT PROPELLER.

APPLICATION FILED JULY [9.1916- Patented Nov. 12, 1918.

2 SHEETS-SHEET I WITNESSES \J..A. FITZPATRICK.

BOAT PROPELLER.

APPLICATION FILED 1ULY19.1916.

Patented Nov. 12, 1918.

2 SHEETSTISHEET 2.

INVENTOB fizz 104i E FZPW m1:

ATHIRNEVS E. ,fi h s WITNESSES A .z; Tun.

iveient means, mounlreci en the bearing i s preveii; mei'einent of said slieii; reloto the bearing easel" poiiien e1? emsrgemeni 9 of e obeyond. the ester end of bearing (ne -vessel bored t roietsbiy receive The fitter lies ZL-"riWEiiIG-Ci its ends 13. The letter e set at right sch ether. slesriy indicated in h s. The blscies and rod 12 may, ii seems he formed 0i a single piece of metal, 01 fie bis-fies may be made separately 11ml subsequently attached :0 the rod in any smi esisle manner. [is the she ftis sot-sized, lzurns with is, and she same iii red 12 is free to rot *be "with re- A the axis of ssici shaft 10 e The cute? encl of bearing 5 is forme with cam face or-surface at M which surface "s pars li es in a plane as right die sxisxof shaft 10. The cam line of the vessel, is provided with clepressie-iis as at 15, "which depressions are subs-5211152111 i -sil aped, and areof such diiensions as to receive the corners 01'? a rem I block 16 fixedly mounted 011 the reel iii- 0116 side of the end of shaft 10. As the reel 12 turns uncle? the influence of shaft 10, one side of the block 16 rides the cam face 14, and it will be ZlCfifisil that when one of the depressions has been ieaiinecl the rod may be turned a quartel revolution as the comer of the block gaasses the depression 15,

Means for automatically turning saifiwocl 21%; these intervals includes a pinion 17 fixed} mounsed on EOd 12 adjacent block 16 2m leaving four teeth 18 each of which is sit-uelel centrally of one side of the block and. proiecis beyond ihai; side a slight distance" e-ppesite sides of each of lhe depressions ii e ear-s surface are mounted the 1:1 2, are mo -used sel suiiebi members of a pair of Mesh-19, which teeth are adapted in cooperate with the teeth 18 oi cam 1'4 in efi'eeting the auiomatic and in- "ierm ieiit ifomtioii of the rod 12. As the (i rotates, the teeth 18 on the cog will perimiiceiiy engage with one of the teeth 19., so as 'se-: ;eec1the querterirevolution of tlie'rori. 12 end thisection will take place wiieileer the preeeller is being driven in a forward onin a reverse direesion, whereby it mess these; U

@mes'slie Iowa-blade '13, or that one which is delivering the force 'oflered to the partial rotation of the rod 12. However, at the points intermediate the depressions 15, one of the edges of the block 16 rides against the base of the cam 14, and thus prevents rotation of the rod. It will of course be understood that if desirable the block 16 and cog wheel 17 may be cast integrally or formed integrally with the rod 12, and similarly the cam 14: and teeth 19 may be cast or formed integrally with the bearing. The portions of the bearing which PIOJBCt without the vessel are tapered at front and rear, as indicated at 20, as to ofier a minimum degree of resistance to the water.

The rod 12 on the side of shaft 10 opposite the block 16, is equipped with a suitable sleeve or shoulder 21, to prevent longitudinal movement of the rod 12 through the shaft. This shoulder ,or sleeve does not however, interfere with the rotary movement of the rod relatively to the shaft.

Such a propeller as I have provided will be found to give a maximum degree of power whether fully or whether half submerged, since the returning blade meets little or no resistance by reason of the fact that it cuts edgewise through the water or air as the case may be, while the lower blade or that one delivering the stroke is forced through the waterat right angles to the line of movement. One of the many advantages of my propeller is that a great 'number of them may be mounted on the sides of a vessel, and may be driven in unison in effecting the propulsion of said vessel at great s eed. One of the drawbacks of the use 0 ordinary stern ropellers is that the number of them which may be used on any one vessel is greatly limited.

Any suitable method for lubricating the various moving parts of the device may be employed. 1 have as a suggestion for a method by which the rod 12 may be lubricated, shown in Fig. 3, the shaft 10 as being provided with a duct 22 which leads to the rod 12 from the bearing 5 so that the oil from the bearing may be fed to said rod at its bearing point with the shaft.

1 claim 1. The combination with a vessel, of a propeller including a bearing attached to the side of the vessel,a power shaft rotatably extending through the bearing and 'havin at its outer end an enlargement rotata ly bearing against the said bearing, 1 rod journaled transversely through the enlargement and provided with blocks set at right angles to each other, a rectangular block fixed on the rod on one side of the enlargement and bearing against the en largement for holding the rod against longitudinal displacement in one direction, a shoulder on the rod bearing against the enlargement on its opposite side for holding the rod against longitudinal displacement in an opposite direction, a circular cam on the bearing surrounding the power shaft against which the blockbears and with which the block cooperates in controlling the rotation of the rod, a gear Wheel mounted on the rod above the block, and means on the bearing beyond the cam with which the gear wheel. cooperates in effecting intermittent rotation of the rod.

2. The combination with a vessel of a bearing attached to the side of the vessel below the water line and having its outer portion projecting a distance beyond the vessel, a propeller supported in the bearing and arranged at'the outer end of the bearing whereby to be spaced from the side JOHN FITZPATRICK. 

